XML : XSL variable set and get

The problem is that I don't know how to set and the get value of xsl variable.

   1.            <ul>   2.                <xsl:for-each select="CITIES/CITY">   3.                    <li>   4.                        <a type="button" style="font-size: 20px">   5.                            <xsl:value-of select="NAME"/>   6.                            <xsl:variable name="id" select="@id"/>   7.                        </a>   8.                    </li>   9.                </xsl:for-each>  10.            </ul>  11.          12.            <city>  13.                <xsl:template match="CITIES/CITY[@id]">  14.                    <xsl:value-of select="NAME"/>  15.                    <details>  16.                        <xsl:value-of select="CREATE_ID"/>  17.                        <xsl:value-of select="UPDATE_ID"/>  18.                        <xsl:value-of select="CREATE_DATE"/>  19.                        <xsl:value-of select="CONFIRMED"/>  20.                        <xsl:value-of select="STADIUM"/>  21.                        <xsl:value-of select="KM_STADIUM"/>  22.                        <xsl:value-of select="APPROACH"/>  23.                        <xsl:value-of select="PUBLICTRANS"/>  24.                    </details>  25.                    <textCities>  26.                        <xsl:value-of select="TEXT"/>  27.                    </textCities>  28.                </xsl:template>  29.            </city>            

So I'm trying to set variable in the 6. line, and get it in 13. What am I doing wrong?